Key Features & Specifications

Key Features

  • 4 x 55W RMS @ 4Ω / 2 x 160W RMS bridged

  • Class D digital amplifier – >90% efficiency

  • Compact size: 17.65 x 4.6 x 6.7 cm (6.9″ x 1.8″ x 2.6″)

  • High-level & low-level inputs (auto signal detection)

  • Optional ISO Plug & Play harness for factory integration

  • Active crossovers for each channel pair

  • No battery connection required

  • Compatible with all head units

  • Designed to pair perfectly with Focal Integration and Inside speakers

Sound Acoustics

  • Product type : Utra-compact amplifier
  • Harmonic distortion rate : 0.0002

Sound Electronics

  • Bridged RMS power : 2×160 WRMS
  • CEA power : 4×55 WRMS
  • Number of channels : 2
  • Class : D

Design

  • Depth : 175 mm
  • Height : 66.5 mm
  • Width : 47 mm
  • Weight : 550 g

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Why Choose Focal Australia

Click & Collect Available

Click & Collect available from participating Authorised Focal Australia Dealers.

Official Australian Stock

Official Australian stock supplied through the Authorised Focal Australia Dealer Network.

Vehicle-Specific Solutions

Vehicle-specific installation solutions available for thousands of vehicles.

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Nationwide Authorised Dealer Network for sales, advice, installation and after-sales support.

Australia-Wide Shipping

Australia-wide shipping available through our network of Authorised Focal Australia Dealers.

12-Month Australian Warranty

Backed by a 12-month Australian warranty, extended to 3 years when installed by an Authorised Focal Australia Dealer.

Expert Installation Available

Expert installation available through our Australia-wide Authorised Dealer Network.

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IMPULSE 4.320 | Compact 4-Channel Digital Amplifier – Focal Integration Series

NOTE:

  • Plug and play compatibility will depend on harnesses available for selected vehicles.
  • Secondary 3rd party vehicle harness may be required.
  • Products and compatibility may change without notice.
  • To ensure correct product and vehicle compatibility please contact your nearest Focal Car Audio  Australia Authorised Dealer.

Compact Power. Pure Efficiency. Plug & Play Precision.

The Focal Impulse 4.320 is a compact 4-channel digital amplifier engineered to breathe new life into factory or aftermarket head units.
With 4×55 Watts RMS at 4 Ohms, it delivers the dynamic, distortion-free power your speakers need to reach their full potential — without complex wiring or installation.

Designed for OEM integration and simplicity, the Impulse 4.320 installs seamlessly behind your dash or centre console, transforming your car’s sound system with clean, detailed, and powerful output.

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Next-Generation Class D Performance

Built on Focal’s FD amplifier technology platform, the Impulse 4.320 achieves over 90% efficiency, minimising heat and power draw while maximising output.
The result is fast transient response, low distortion, and a rich, open soundstage — all from a chassis measuring just 17.65 x 4.6 x 6.7 cm (6.9″ x 1.8″ x 2.6″).

Delivering 4x55W RMS or 2x160W RMS bridged at 4 Ohms, it’s the ideal amplifier for powering front and rear speakers or driving a 2-way system with a compact subwoofer.
Whether you’re upgrading an OEM setup or fine-tuning a hi-fi installation, the Impulse 4.320 offers uncompromising clarity in a truly compact form.


Effortless Installation and Integration

The Impulse 4.320 is designed for semi Plug & Play installation with no need for direct connection to the battery.
It includes:

  • High-level inputs (with auto signal detection) for OEM head units

  • Low-level RCA inputs for aftermarket systems

  • All cables, power connectors, and mounting hardware for quick setup

An optional ISO harness (sold separately, $65.00) allows Plug & Play connection directly behind the factory head unit — no soldering, no cutting, no modifications.

This makes it one of the cleanest amplifier installs available today for both enthusiasts and professional installers.

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Flexible Configuration for Every Setup

The Impulse 4.320 features 2-, 3-, and 4-channel modes, offering the versatility to power a full-range system, front speakers and subwoofer, or a compact dual-amp configuration.

Each channel pair includes an active crossover for precise tuning:

  • Front channels: Full-range or high-pass above 75 Hz

  • Rear channels: Full-range, high-pass, or low-pass (for subwoofer use)

  • Progressive phase control for perfect time alignment with mixed driver sizes

With its tailored filtering and tuning options, the Impulse 4.320 delivers balanced, dynamic sound — from clean highs to full-bodied low end.


Focal Integration – Clean Power, Compact Design

The Impulse 4.320 embodies Focal’s integration philosophy: OEM compatibility, compact design, and uncompromising sound quality.
It’s the ideal solution for anyone who wants a dramatic upgrade in clarity, depth, and impact — without tearing their vehicle apart.

Plug it in. Power it up.
Experience true Focal performance — refined, powerful, and effortless.

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IY-Impulse-Cable

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Special Note

This product can be powered by the Impulse 4.320 and related harnesses with very easy installation options.

FOCAL Inside HARNESS Compatibility List (AUGUST 2023)

Focal IMPULSE 4.320 Compatible Vehicles

Alfa Romeo 4C, 8C, 147, 156, 159, Brera, Giulietta, Gt, Mito
Alpine A110 Pure
Audi A1, A2, A3, A4, A5, A6, A7, Q2, Q3, Q4 E-tron, Q5, Q7, TT
BYD Atto 2, Atto 3, Atto 4, D1, Dolphin, E2, E6, Ea1, F3, F3 R, F6, G3, G5, G6, Han, L3, S5 (song plus), S6, S7, Seal, Song, Song Max, Song Plus, Song PRO, Surui (replace f6), Tang, Yuan
Citroën Berlingo II (phase3), Berlingo III, C1, C3, C3 Aircross, C3 III, C3 IV, C3 suv, C4 Cactus, C4 Cactus II, C4 Grand Space Tourer, C4 II, C4 III, C4 Picasso I, C4 Space Tourer, C5 aircross, C5 II, C5 X, Jumpy III / IV, Space Tourer
Cupra Ateca cupra, Born, Formentor, Leon cupra, Leon sportourer cupra
Daihatsu Ayla, Materia, Xenia III
Datsun Go, Go +, Go Cross
DS Automobiles DS3, DS3 Cabrio, DS3 Crossback, DS4, DS4 Crossback, DS5, DS7 Crossback, DS7 II, DS9
Ferrari 360, 599, 612 Scaglietti, F430
Fiat 124 spider, 500, 500 II, 500 L, 500 X, Albea, Bravo, Doblo, Doblo II, Freemont, Grande Punto, Idea, Linea, Nuovo Scudo, Panda, Qubo, Scudo, Scudo III, Stilo, Talento, Talento VU, Tipo, Ulysse
Ford B-Max, Bronco 4 doors, Bronco sport, C-Max, E-series, E-Transit Custom, Ecosport, Edge, Edge II, Endeavour II, Endeavour III, Endura, Equator, Escape, Escort, Everest II, Everest III, Evos, Expedition, Expedition Max, Explorer EV, Explorer V, Explorer VI, F-150, F-150 Raptor II, F-250, F-350, F-450 Super Duty, Fiesta VI, Fiesta VII, Figo, Figo aspire, Focus III, Focus IV, Focus IV Active, Freestyle india, Fusion, Galaxy II, Galaxy III, Ka +, Ka Sedan / Urban, kuga II, kuga III, Lobo, Maverick, Mondeo III, Mondeo IV, Mondeo V, Mustang Match E, Mustang VI, Mustang VI Convertible, Mustang VII, Puma II, Ranger III, Ranger III Raptor, Ranger III Simple Cab, Ranger III Super Cab, Ranger III Supercrew Cab, Ranger IV, Ranger IV Raptor, S-Max II, Sharp, Taurus VII, Territory, Tourneo Connect, Tourneo Connect II, Tourneo Courier, Tourneo Courier II, Tourneo Custom I Phase 1, Tourneo Custom I Phase 2, Tourneo Custom II, Transit Connect, Transit Connect II, Transit Courier, Transit Courier II, Transit Custom I phase 1, Transit Custom I phase 2, Transit Custom II, Transit Custom nugget/ trail, Transit Van
Geely Atlas, Borui, Boyue, Coolray, Emgrand X3, Emgrand x7 sport, GS, NL3, Tugella, Xingyue
Infiniti FX35, G, G35, I30, I35, M35/M45, Q45, Q45 / Q50, QX56
Isuzu Dmax, Mu-X II
Jaguar e-pace, F-pace, I-pace, XE, XF
Lada Largus Cross, Largus Universal, Largus Wagon VU, Vesta, Vesta Sw, Xray
Land Rover Defender II, Discovery sport, Evoque
Lexus CT, ES V, ES VI, ES VII, GS III, GS IV, GX, IS, IS II, IS III, IS IV, LBX, LM, LS IV, LS V, LX II, LX III, NX, NX II, RC F, RX, RX II/III, RX IV, RX L, UX
Mazda -2 II, -2 III, -2 IV hybrid, -3 Bm/Bn 5 Doors, -6 / atenza Japan, -6 GJ/ GL Sedan/ wagon, -6 sedan, Bt-50 II picK up, Bt-50 III picK up, Cx-3, Cx-5 I, Cx-5 II, Cx-9, Cx-60, Demio III, Mz-5 Miata ND, Mz-5 Miata RF /Fastback
Mercedes A Class, B Class, C Class, CLC Class, GLA Class, Sprinter, V Class, Vito
Mitsubishi Asx, Colt, Express (australia)
Nissan 350Z, 370Z, Almera IV, Almera V, Altima, Armada, Cube, Frontier, GT R, Juke, Kicks, Leaf, Liwie, March, Maxima, Micra, Murano, Navara d23 Double Cab, Navara d23 Simple Cab, Note, Np 200, Np 300, Nv 300, Nv 400, Pathfinder, Patrol y62, Pulsar, Qashqai II, Qashqai III, Qijun, Quest, Rogue, Rogue IV, Sentra / Sylphy, Serena, Teana, Terrano III, Terrano IV, Tiida, Titan I, Titan II, Townstar, Urvan, Vera, Versa N17, Versa N18, X-terra, X-trail III, X-trail IV
Peugeot 107, 108, 206, 206 phase 2, 206+, 207, 207 CC, 207+, 208 3 Doors, 208 5 Doors, 208 II 5 Doors, 301, 307, 308, 308 CC, 308 III, 308 SW, 308 SW III, 406, 407, 407 Coupé, 408, 408 china, 508 I, 508 II 508 sw II, 508 II 508 sw II phase II, 508 RXH I, 508 SW I, 607, 807, 1007, 2008, 2008 II, 3008, 3008 II, 3008 III, 4007, 4008, 5008, E 208 II 5 Doors, E 2008 II, Expert I and II, Expert III VU, Partner I and II, Partner III, RCZ, Rifter, Traveler III
Proton X50, X70
Renault Alaskan, Arkana, Austral, Captur I Phase 1, Captur I Phase 2, Captur II, Clio II, Clio III, Clio IV, Clio IV ESTATE/GRANDTOUR, Clio IV Phase 1, Clio IV Phase 1 ESTATE/GRANDTOUR, Clio IV Phase 2, Clio IV Phase 2 ESTATE/GRANDTOUR, Clio V, Espace IV, Espace V, Fluence, Grand Scenic IV Intens, Grand Scenic IV Life/Zen/Business, Kadjar, Kangoo II and VU, Kangoo III and VU, Kaptur Russia, Koleos I, Koleos II, Laguna II, Laguna III, Latitude, Master III, Master III VU, Megane E tech, Mégane II, Mégane III – Except CC, Mégane III CC, Megane IV ESTATE Life/Business, Megane IV ESTATE Zen/Intens/GT, Megane IV Life/Business, Megane IV SEDAN, Megane IV Zen/Intens/GT, Modus, Scénic II, Scénic III, Scenic IV Intens, Scenic IV Life/Zen/Business, Scenic V E-tech, Taliant, Talisman, Talisman Estate grand tour, Trafic III, Trafic III VU, Twingo II, Twingo III, Vel Satis, Wind, Zoé
Scion FRS, IA, IM, IQ, TC, XA, XB, XD
Seat Alhambra I, Alhambra II, Alhambra II face lift, Altea, Altea xl, Arona, Arosa, Ateca, Cordoba I, Cordoba II, Exeo, Ibiza III, Ibiza IV, Ibiza V, Leon I, Leon II, Leon III, Leon IV, Mii, Tarraco, Toledo II, Toledo III, Toledo IV
Skoda Citygo, Enyaq iv, Enyaq iv coupe, Fabia I, Fabia II, Fabia III, Fabia IV, Kamiq, Karoq, Kodiaq, Kushaq, Octavia, Octavia II, Octavia II Combi, Octavia III, Octavia IV, Rapid, Roomster, Salvia, Scala, Superb I, Superb II, Superb III, Yeti, Yeti II
Smart Forfour, Forfour 4 Doors, Fortwo, Fortwo brabus no jbl, Fortwo Cabriolet, Fortwo EV Electric
Subaru Ascent, Brz, Brz II, Crosstrek XV, Forester III, Forester IV, Forester V, Impreza III, Impreza IV, Impreza V, Legacy V, Legacy VI, Legacy VII, Levorg, Levorg II, Outback IV, Outback V, Outback VI, Solterra, Wrx /sti, Wrx /sti VA, XV e-boxer
Suzuki Across, Landy, Swace, Vitara
Toyota 4 Runner, Alphard Ah20 II, Alphard Ah30 III, Altis, Aqua, Auris I, Auris II, Auris TS, Avalon, Avanza III, Avensis T25, Avensis T27, Avensis Verso, Aygo FL, Aygo I, Aygo II, Aygo X, BZ3, BZ4X, C-Hr, Camry V, Camry VI, Camry VII, Camry VIII, Celica, Commuter, Corolla Axio, Corolla cross, Corolla GR, Corolla Hatchback, Corolla IX/ X Verso, Corolla quest, Corolla Touring, Corolla XI, Corolla XII, Crown kluger, Crown suv, Crown XV, Crown XVI suv, Echo, Esquire, Etios Liva, Fj Cruiser, Fortuner I, Fortuner II, Fortuner III, Frontlander, Glanza, GR86, GT86, GT86 II, Harrier II, Harrier III, Harrier IV, Hi-ace VI grandia tourer, Highlander, Highlander III / IV, Highlander IV, Hilux 7/8 gen, Hilux IX, Innova crysta, Innova hypercross, Innova II, Innova III AG10, IQ, Izoa, Kluger, Land Cruiser 100 series, Land Cruiser 200 series, Land Cruiser 300 series, Land Cruiser 400 series, Legender, Levin, Matrix, Mirai, MR2, Nav 1, Noah X, Passo, Prado, Prius C, Prius C crossover, Prius I, Prius II, Prius III, Prius IV, Prius V, Prius v +, Pro Ace, Pro Ace II, Pro Ace II Verso, Raize, Rav 4, Revo, Rush, Sequoia I, Sequoia II, Sequoia III, Sienna, Sienna II, Sienna III, Sienna IV, Sienta, Solara I, Solara II, Supra, Sw4, Tacoma, Tacoma Double Cab, Tacoma Simple Cab, Truckmasters OX, Tundra II Double Cab, Tundra II Double Cab / 2 Doors, Tundra II Double Cab / 4 Doors, Tundra III, Urban Cruiser, Vellfire Ah20, Vellfire Ah30, Veloz, Venza, Verso, Verso S, Vios, Vitz, Voxy, Wigo, Wildlander, Yaris, Yaris /vitz, Yaris Ativ, Yaris Cross, Yaris GR, Yaris IA sedan, Zenix
Volkswagen Amarok, Amarok II, Arteon, Arteon break, Atlas, Atlas cross sport, Beetle, Beetle III, Bora, Bora Variant, C-trec, Caddy III, Caddy IV, Caddy V, CC, Crafter, Crafter II, Eos, Fox, Gol, Golf 4, Golf 4 Variant, Golf 5, Golf 6, Golf 6 cabriolet, Golf 7, Golf 7 alltracks, Golf 8, Golf plus, Golf sportvan, ID buzz, ID buzz cargo, ID3, ID4, ID5, ID6 crozz / x, ID7 / ID7 break, Jetta V, Jetta VI, Jetta VII, Lamando, Lamando II, Lavida, Lavida plus, Lupo, Magotan, New Beetle, Nivus, Passat, Passat CC, Passat Variant, Phaeton, Phideon, Polo IV, Polo V, Polo VI, Polo VII, Sagitar II and III, Santana New, Scirocco III, Scirocco III Facelift, Sharan, Sharan II, Sharan II facelift, T-Cross, T-Roc, T-Roc cab, T-sport, T5 Multivan, T6 Multivan, T6.1 Multivan, T7 Multivan, Tacqua, Taigo, Taigun, Talagon, Taos, Taramont, Taramont x, Tarek, Tavendor, Tayron, Tharu, Tiguan I, Tiguan II, Tiguan III, Tiguan X, Touareg I, Touareg II, Touareg III, Touran, Touran II, Touran III, Up, Up E-Up, Vento, Viloran, Virtus
Volkswagen MAN Tge double cab, Tge utility and single cab

10 Reasons Focal Stands Apart

For more than four decades, Focal has combined French acoustic engineering, innovative speaker technologies and premium materials to create exceptional car audio systems.

Discover the engineering, heritage and technology behind one of the world’s leading car audio brands.

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